| /**************************************************************** |
| * Licensed to the Apache Software Foundation (ASF) under one * |
| * or more contributor license agreements. See the NOTICE file * |
| * distributed with this work for additional information * |
| * regarding copyright ownership. The ASF licenses this file * |
| * to you under the Apache License, Version 2.0 (the * |
| * "License"); you may not use this file except in compliance * |
| * with the License. You may obtain a copy of the License at * |
| * * |
| * http://www.apache.org/licenses/LICENSE-2.0 * |
| * * |
| * Unless required by applicable law or agreed to in writing, * |
| * software distributed under the License is distributed on an * |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * |
| * KIND, either express or implied. See the License for the * |
| * specific language governing permissions and limitations * |
| * under the License. * |
| ****************************************************************/ |
| |
| package org.apache.james.mime4j.util; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| public class ByteArrayBufferTest { |
| |
| @Test |
| public void testConstructor() throws Exception { |
| ByteArrayBuffer buffer = new ByteArrayBuffer(16); |
| Assert.assertEquals(16, buffer.capacity()); |
| Assert.assertEquals(0, buffer.length()); |
| Assert.assertNotNull(buffer.buffer()); |
| Assert.assertEquals(16, buffer.buffer().length); |
| try { |
| new ByteArrayBuffer(-1); |
| Assert.fail("IllegalArgumentException should have been thrown"); |
| } catch (IllegalArgumentException ex) { |
| // expected |
| } |
| } |
| |
| @Test |
| public void testSimpleAppend() throws Exception { |
| ByteArrayBuffer buffer = new ByteArrayBuffer(16); |
| Assert.assertEquals(16, buffer.capacity()); |
| Assert.assertEquals(0, buffer.length()); |
| byte[] b1 = buffer.toByteArray(); |
| Assert.assertNotNull(b1); |
| Assert.assertEquals(0, b1.length); |
| Assert.assertTrue(buffer.isEmpty()); |
| Assert.assertFalse(buffer.isFull()); |
| |
| byte[] tmp = new byte[]{1, 2, 3, 4}; |
| buffer.append(tmp, 0, tmp.length); |
| Assert.assertEquals(16, buffer.capacity()); |
| Assert.assertEquals(4, buffer.length()); |
| Assert.assertFalse(buffer.isEmpty()); |
| Assert.assertFalse(buffer.isFull()); |
| |
| byte[] b2 = buffer.toByteArray(); |
| Assert.assertNotNull(b2); |
| Assert.assertEquals(4, b2.length); |
| for (int i = 0; i < tmp.length; i++) { |
| Assert.assertEquals(tmp[i], b2[i]); |
| Assert.assertEquals(tmp[i], buffer.byteAt(i)); |
| } |
| buffer.clear(); |
| Assert.assertEquals(16, buffer.capacity()); |
| Assert.assertEquals(0, buffer.length()); |
| Assert.assertTrue(buffer.isEmpty()); |
| Assert.assertFalse(buffer.isFull()); |
| } |
| |
| @Test |
| public void testExpandAppend() throws Exception { |
| ByteArrayBuffer buffer = new ByteArrayBuffer(4); |
| Assert.assertEquals(4, buffer.capacity()); |
| |
| byte[] tmp = new byte[]{1, 2, 3, 4}; |
| buffer.append(tmp, 0, 2); |
| buffer.append(tmp, 0, 4); |
| buffer.append(tmp, 0, 0); |
| |
| Assert.assertEquals(8, buffer.capacity()); |
| Assert.assertEquals(6, buffer.length()); |
| |
| buffer.append(tmp, 0, 4); |
| |
| Assert.assertEquals(16, buffer.capacity()); |
| Assert.assertEquals(10, buffer.length()); |
| } |
| |
| @Test |
| public void testInvalidAppend() throws Exception { |
| ByteArrayBuffer buffer = new ByteArrayBuffer(4); |
| buffer.append((byte[]) null, 0, 0); |
| |
| byte[] tmp = new byte[]{1, 2, 3, 4}; |
| try { |
| buffer.append(tmp, -1, 0); |
| Assert.fail("IndexOutOfBoundsException should have been thrown"); |
| } catch (IndexOutOfBoundsException ex) { |
| // expected |
| } |
| try { |
| buffer.append(tmp, 0, -1); |
| Assert.fail("IndexOutOfBoundsException should have been thrown"); |
| } catch (IndexOutOfBoundsException ex) { |
| // expected |
| } |
| try { |
| buffer.append(tmp, 0, 8); |
| Assert.fail("IndexOutOfBoundsException should have been thrown"); |
| } catch (IndexOutOfBoundsException ex) { |
| // expected |
| } |
| try { |
| buffer.append(tmp, 10, Integer.MAX_VALUE); |
| Assert.fail("IndexOutOfBoundsException should have been thrown"); |
| } catch (IndexOutOfBoundsException ex) { |
| // expected |
| } |
| try { |
| buffer.append(tmp, 2, 4); |
| Assert.fail("IndexOutOfBoundsException should have been thrown"); |
| } catch (IndexOutOfBoundsException ex) { |
| // expected |
| } |
| } |
| |
| @Test |
| public void testAppendOneByte() throws Exception { |
| ByteArrayBuffer buffer = new ByteArrayBuffer(4); |
| Assert.assertEquals(4, buffer.capacity()); |
| |
| byte[] tmp = new byte[]{1, 127, -1, -128, 1, -2}; |
| for (byte b : tmp) { |
| buffer.append(b); |
| } |
| Assert.assertEquals(8, buffer.capacity()); |
| Assert.assertEquals(6, buffer.length()); |
| |
| for (int i = 0; i < tmp.length; i++) { |
| Assert.assertEquals(tmp[i], buffer.byteAt(i)); |
| } |
| } |
| |
| @Test |
| public void testSetLength() throws Exception { |
| ByteArrayBuffer buffer = new ByteArrayBuffer(4); |
| buffer.setLength(2); |
| Assert.assertEquals(2, buffer.length()); |
| } |
| |
| @Test |
| public void testSetInvalidLength() throws Exception { |
| ByteArrayBuffer buffer = new ByteArrayBuffer(4); |
| try { |
| buffer.setLength(-2); |
| Assert.fail("IndexOutOfBoundsException should have been thrown"); |
| } catch (IndexOutOfBoundsException ex) { |
| // expected |
| } |
| try { |
| buffer.setLength(200); |
| Assert.fail("IndexOutOfBoundsException should have been thrown"); |
| } catch (IndexOutOfBoundsException ex) { |
| // expected |
| } |
| } |
| |
| @Test |
| public void testRemove() throws Exception { |
| ByteArrayBuffer b = new ByteArrayBuffer(16); |
| byte tmp[] = "--+++-".getBytes("US-ASCII"); |
| b.append(tmp, 0, tmp.length); |
| |
| b.remove(2, 3); |
| Assert.assertEquals(3, b.length()); |
| Assert.assertEquals("---", new String(b.buffer(), 0, b.length(), "US-ASCII")); |
| b.remove(2, 1); |
| b.remove(1, 1); |
| b.remove(0, 1); |
| Assert.assertEquals(0, b.length()); |
| |
| tmp = "+++---".getBytes("US-ASCII"); |
| b.append(tmp, 0, tmp.length); |
| |
| b.remove(0, 3); |
| Assert.assertEquals(3, b.length()); |
| Assert.assertEquals("---", new String(b.buffer(), 0, b.length(), "US-ASCII")); |
| b.remove(0, 3); |
| Assert.assertEquals(0, b.length()); |
| |
| tmp = "---+++".getBytes("US-ASCII"); |
| b.append(tmp, 0, tmp.length); |
| |
| b.remove(3, 3); |
| Assert.assertEquals(3, b.length()); |
| Assert.assertEquals("---", new String(b.buffer(), 0, b.length(), "US-ASCII")); |
| b.remove(0, 3); |
| |
| Assert.assertEquals(0, b.length()); |
| } |
| |
| @Test |
| public void testInvalidRemove() throws Exception { |
| ByteArrayBuffer buffer = new ByteArrayBuffer(16); |
| buffer.setLength(8); |
| try { |
| buffer.remove(-1, 0); |
| Assert.fail("IndexOutOfBoundsException should have been thrown"); |
| } catch (IndexOutOfBoundsException ex) { |
| // expected |
| } |
| try { |
| buffer.remove(0, -1); |
| Assert.fail("IndexOutOfBoundsException should have been thrown"); |
| } catch (IndexOutOfBoundsException ex) { |
| // expected |
| } |
| try { |
| buffer.remove(0, 9); |
| Assert.fail("IndexOutOfBoundsException should have been thrown"); |
| } catch (IndexOutOfBoundsException ex) { |
| // expected |
| } |
| try { |
| buffer.remove(10, 2); |
| Assert.fail("IndexOutOfBoundsException should have been thrown"); |
| } catch (IndexOutOfBoundsException ex) { |
| // expected |
| } |
| } |
| |
| } |